US Draft Co.
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ODCS OverDraft Control Air System ABOUT The OverDraft Control Systems from US Draft Co maintains a constant negative pressure in the exhaust common manifold or individual chimney/vent. Designed with EC-Flow Technology™, the ODCS takes advantage of US Draft Co. bi-directional pressure transducer and proprietary PID technology to rapidly respond to varying manifold or individual system pressure on Category I, II, III & IV as well as building heating appliance systems. Utilizing the Opposed Blade Damper (OBD) or Single Blade Damper (SBD), a V-series control and pressure transducer, the system interlocks with fossil fuel fired heating appliances to maintain the required outlet pressure of the manufacturer.

OBD Opposed Blade Damper control-option

Control Options

V150 Constant Pressure Controller
  • - Up to 2 Appliances
  • - Up to 2 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 4-button LCD screen
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V200 Constant Pressure Controller
  • - Up to 4 Appliances
  • - Up to 2 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 4-button LCD screen
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V250 Constant Pressure Controller
  • - Up to 6 Appliances
  • - Up to 2 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 4" Color Touchscreen
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V300 Constant Pressure Controller
  • - Up to 4 Appliances
  • - Up to 3 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 7" Color Touchscreen
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V350 Constant Pressure Controller
  • - Up to 15 Appliances
  • - Up to 3 Applications
  • - True bi-directional (+/- 1.0" wc)
  • - 7" Color Touchscreen
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AX42 Constant Speed Controller
  • - Up to 4 Appliances
  • - Up to 2 Applications
  • - Fixed speed
  • - On-board potentiometer
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